Furnace-grate.



J. & A. NICLAUSSE.

FURNACE GRATE.

APPLICATION FlLED APR-5.1915.

Patented July 3, 1917.

2 SHEETSSHEET I.

'J. & A. NICLAUSSE.

FURNACE GRATE.

APPLICATION FILED APR. 5. 1915.

LE3} ,QSU Patented July 3, 1917.

2 SHEETS-SHEET 2. fg/f.

TE dTAThld PAlEhlT @lfilfilt.

JULES NICLAUSSE AND ALBERT NICLAUSSE, OF PARIS, FRANCE.

FUBNACE-GRATE.

Application filed April 5, 1915.

To all whom zit may concern.

Be it known :that we, JULns Nremnssn and ALBERT NICLAUSSE, of 24 Rue des Ardennes, Paris, France, engineers, have invented new and useful Improvements in clcanthe grate bv the shearing action; the

grate is preferz-ibly divided into twoor more parts whose inclination and travel need not be the same but may differ as may be ClGS1I'- able according to the quality of the fuel.

The grate maybe divided into, forexample, two parts of which-thefirst has a fairly steeo slope, the second a smaller slope. The movement of the first :part is such that its lower portion has the largest travel the upper portion being almost stationary so that the fuel is advanced and distributed without a useless fall of dust: hrough the bars. The travel of the second part is greaterzthan that of the first so as to insure the removal of the cinder while allowing complete combustion.

The bars of each part are composed of identical elements, suitably assembled to gether, to facilitate construction and maintenance.

The barsmay all be movable and be given alternating to and fro movements of vari able speed, or again fixed bars may alternate with movable bars.

In both cases the movable bars may be controlled in any suitable manner, for example, a rock shaft, levers and suitable connecting rods. i

The accompanying drawings illustrate the invention as applied to a "known type I of boiler.

In the drawings, Figure 1 is a sectional elevationof the grate and Fig. 2 is a .detail view to a larger scale.

Fig. 3 is a section :on the line A-BC of and is divided into at least :two parts.

Specification ofLetters Patent.

Patented July 3, 1917.

Serial No. 19,210.

(1) A front inclined part A which distributes and feeds the fuel downward. The fuel is delivered in any suitable manner, for example, by means of a hopper B and a chute C, a stop D being provided to regu latethe depth of fuelon the bars.

(2) A rear part A which is less inclined and which receives partiallylmrnt fuel from the frontpart, combustion proceeding until at the end of the grate only cinder, clinker and scoria remain which are thrown into a pit B.

Each part A and A as shown in the drawing is composed of a certain number of fixed bars alternating withbars which are movable to and fro. They may, however, be each formed solely of movablebars.

In the front grate A each fixed and each movable bar is formed of three adj acent bars 1, 2 and 3supported at the top by a guide 1 and assembled together by projections 5 on the central bar 2 which take into corresponding recesses 66 in the two side bars 1 and 8.

The central bar 2 has at its lower end a stem 7 which restsupon a guide'S; this stem serves in the case of a fixed bar to maintain the bars 1, 2, 3 in position, and in the case of a movable bar to impart to its foot the travel desired.

As the rear grate A is generally longer thanthe front grate A the barsare made in suitable lengths as may be necessary. In the drawing three nearly equal lengths are shown. The first length of each bar whether fixed or movable forms to some ex tent the continuation of the front grate A It iscomposed ofthree adjoining bars 9, 10 and 11 assembled together bypins 12 on the central part 10 and is supported at both ends on the guides S and 13. lVhile the central bar 10 stops nearto the guide 8 thus leaving an empty space 14 the two side bars!) and 11 are prolonged (on both sides of the stem 7 on the central bar 2 of the corresponding front bar) beyond the guide 8 and are oined together 'bythepin 15. The side bars 9 and 11 are provided with grooves 16 in which engage theshoulders 7 of the stem 7 A to and fro movement is transmitted to the :movable .bars of the rear grate A by means "of a connecting rod 17 (made fast to the side bars 9 and 11 by the pin 15) the crank arm 18 and the rock shaft 19. The movable bars of the rear grate A drive through the stem 7 the movable bars of the front grate A The arrangement is such that the horizontal travel of the stem 7 is equal to the difference between the travel of the first length of movable bar of the rear grate A and the size of the grooves 16 in. the bars 9 and 11.

The travel of the movable bars of the rear grate may therefore be varied as re quired and also the travel of the ends of the movable bars of the front grate without, however, the difference between the two travels exceeding a predetermined maximum which is necessary as this allows the protrusion of the fixed bars in the plane of the grate to be reduced during the move ment of the bars to a strict minimum.

The upper ends of the movable bars of the front grate A rest as has been seen upon the guide t and are not displaced horizontally by the travel of the lower end, but are slightly displaced in the direction of the slope sufficiently to insure the feed of the fuel on the gratebut so as not to cause useless fall of dust through the bars 7 into the ash pit.

Projections on the guide 8 located opposite each space 14: are intended to insure the stability of the fixed bars.

The second length of each of the fixed and movable bars of the rear grate is formed of three pieces 21, 22 and 23. The central member 22 is connected to the side members 9 and 11 of the preceding lengths by pins 24 which engage with corresponding recesses in the bars; the side members 21 and 23 are connected to the central member 22 by means of projections 25.

The third length is assembled in the same manner as the second. I

In order to prevent any lifting or side movement of the bars by reason of some resistance resulting for example from the accidental presence between them of a foreign body, the central bars lO and 22 are provided the first with a lug 26 passing beneath the guide 13 in suitable slots 27 formed in this latter, the second with a projection 28 engaging in a suitable recess 29 in the guide 13. The lug and projection force the corresponding bars to travel always in the same place without the possibility of side movement.

In order to allow different qualities of fuel to be employed under the best conditions, the grate may be regulated as to slope and its travel and the speed of the movable bars. The travel. of the movable bars may be different at diflerent portions of the grate. By thus regulating thethickness of the layer of fuel the grate is well adapted to burn the desired quantity of different qualities of fuel.

As the fuel feed is insured by the slope of the front grate combined with a small over, as little small fuel as possible will pass through the bars because of the small travel of the movable bars.

As the bars are sloped and as the surfaces upon which the movable bars rest are horizontal, the clinker will be-sheared and detached. simultaneously with the feed of the fuel toward the back of the grate.

In order that the inlet of air may be reg- V ulated at different points of the grate the ash box is divided into compartments F F F etc.', into which air is admitted through a valve. The valves are connected in twos and threes and actuated by a rod 31 moved from the outside by levers 32 by moving them near to or away from the grate. are actuated by the same lever. By moving this lever the opening of all the valves attached to these two rods is effected at the same time.

What we claim is 1. In a mechanical stoker, the combination of a plurality of inclined fuel advancing grate-bars adapted to be moved in and out of the inclined fuel supporting plane, other grate-bars inclined to the first-named bars for feeding fuel thereto and having lost motion engagement therewith at their ends. and actuating means for the bars.

2. In a mechanical stoker, the combina tion of a plurality of fuel advancing gratebars adapted to be moved in and outof the fuel supporting plane, other grate-bars having supports for inclining them to the first-named bars for feeding fuel thereto and having lost motion engagement therewith at their ends, and means moving the first-named bars in and out of said plane and reciprocating the lower ends of the feeding bars to oscillate their' opposite ends on their supports.

The ends of two consecutive rods- 3. In a mechanical stoker, the combination of a plurality of inclined fuel advancing bars having hor zontal hearings 'on which to .slide, other grate-bars having sup ports for inclining them tothe first-named bars, thelower ends of which' have lost motion engagement with the first-named bars and are slidable on bearings of the first set, stationary bars alternating with bars of both sets, and means for reciprocating one set to oscillate the other set.

4:. In a mechanical Stoker, the combination of a plurality of inclined fuel advancing bars provided with slots and having horizontal hearings on which to slide, other grate-bars inclined to the first-named bars and provided with tongues havingplay engagement with said slots and having their lower ends slidable on bearings of the first set, and means for imparting movement to one set to oscillate the other set.

5. In a stoking grate, an inclined fuel advancing grate having alternating bars movabl v supported on horizontal bearings a second grate inclined to the first for feeding fuel thereto and having alternate bars provided with tongues, said first-named bars having slot openings for receiving said tongues and in which said tongues have a play, and means for reciprocating said bars on then horlzontal bearings.

In testimony whereof We have slgned this specification in the presence of tWo subscrib- 15 v ing witnesses.

J ULES NICLAUSSE. ALBERT NICLAUSSE.

lVitnesses DE VVI'rT (I. POOLE, Jr.,

GASTON DE MESTRAL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

